@inproceedings{nils1979monodromy,
title={Monodromy and asymptotic properties of certain multiple integrals},
author={Nils Nilsson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203508675260336},
booktitle={Arkiv for Matematik},
volume={18},
number={1},
pages={181-198},
year={1979},
}
Nils Nilsson. Monodromy and asymptotic properties of certain multiple integrals. 1979. Vol. 18. In Arkiv for Matematik. pp.181-198. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203508675260336.